SIEVING AND GANGUE DISCHARGING APPARATUS ON GANGUE DISCHARGING SYSTEM FOR COAL CLEANING SYSTEM EMPLOYING AIR AND DRY SAND

摘要

A sieving and gangue discharging apparatus on a gangue discharging system for a coal cleaning system employing air and dry sand, comprising a separation chamber (10), a bottom sieving layer (20), a side sieving layer (30) and gangue discharging claws (40). The bottom sieving layer is fixedly disposed in the separation chamber. One end of the side sieving layer is fixed to the inner wall of the separation chamber, and the other end thereof is fixedly connected to the bottom sieving layer. The gangue discharging claws are disposed in falling and sieving seams of the bottom sieving layer, and the end portions thereof are exposed out of the upper end face of the bottom sieving layer. The bottom sieving layer is formed by a plurality of first sieving bars (21) which are distributed in the separation chamber uniformly. Falling and sieving seams (22) are formed among the adjacent first sieving bars. The side sieving layer is formed by a plurality of second sieving bars (31). The second sieving bars have a certain slope relative to the bottom sieving layer. Falling and sieving seams are formed among the adjacent second sieving bars, and the width thereof is the same as that of the falling and sieving seams on the bottom sieving layer. Moving seats (41) are provided on the bottom portions of the gangue discharging claws for controlling the gangue discharging claws to move on the bottom sieving layer. A gangue discharging opening is formed at one side of the separation chamber and is in communication with the bottom sieving layer. The apparatus enables convenient sieving, the equipment is not damaged thereby easily, and the sieving efficiency is improved.